Go with DLINK DIR-655
Well I don't know about recommending Linksys right now, as they have changed over their complete like to a new sleek modern design. Those that I know who have shelled out big bucks on the top end model Linksys Ultra N Gig are having major issues with wireless dropping daily. Could be a faulty unit. As Netgear top end N Gig also has some DOA issues also. Netgear will replace those routers also.
So that leaves you with DLINK -
How are they doing well their are some things you need to know before you start spending.
1. coverage
2. features
3. price
4. expandable
Now I was like you well I was coming from wired router world and had used dual routers which where wireless access points together. That was fine, until one day I decided to just go with one unit which had better router and wireless features.
Early this month I finally had enough of the crappy models that I had tried/purchased since 11/2007. This month I got something that worked.
Right now with all the brands they're using Draft N 2.0 or better, which is not standardized just yet. N gives you 300MB/s over the wireless which is better than any 10/100 MB/s wired connections.
So average speed on wireless N Draft mode 2 would be 240 to 260MB/s in real life situation. Still now bad!
Then comes in the popular G high speed mode which gives you 54 to 125MB/s, real world you're looking at 48 to 54MB/s.
Their is B but that's a bit too slow, but you'll get with every wireless router today. Their A and D on some, but more companies are pushing N Draft Mode.
DLINK has 3 business wireless routers (can be used in home usage)
N Signal Band Wireless 2.4GHZ
DIR-615 make sure you get B2 hardware model not the A1 (500MHz)
10/100 MB/s LAN and WAN
DIR-625 make sure you get C1 or better hardware not the A1 or B1
10/100 MB/s LAN and WAN but has QOS
DIR-655 make sure you get A3 or better hardware not the A1 or A2.
10/100/1000 GB/s LAN and WAN but has QOS
N Dual Active Band 2.4GHZ and 5.0GHZ both can be used at the same time.
DIR-855
10/100/1000 GB/s LAN and WAN but has QOS and OLED display showing you the router status and etc on the unit itself. This router is very expensive almost double in price of the DIR-655.
Now DIR-855 has some issues so it might be out now, as it was out 3 times until the FCC pulled off the shelves. So when DLINK got the bugs out it would be the best one they make over the DIR-655 which is very popular. I have DIR-655 A3 hardware. No issues and like the DIR-615 which I did buy the A1 I had a lot of issues. One thing about the DIR-655 it covers my square footage over 1,500 and thats from the basement, main floor, upstairs and the attic and plus out back in the woods with a very good to excellent signal. Again this will vary with everyone so you might not get what I get in range signal.
These are my results using PC Tools Bandwidth Tester my ISP (20MB/s down + power booster and 2MB/s up)
If you have more than 1,500 square feet, you might have to buy the DLINK Extender (also known as the wireless bridge or wireless access point) DAP 1522 is new it has 4 GB/s ports, Dual band 2.4GHz and 5.0GHz can make any wired network device wireless. Doesn't need to be connected to any wired switch it is completely on it's own for tapping into the wireless at 100%.
Note: If you're into gaming only their is the DGL series DGL-4500 is like DIR-655 but is has OLED display panel and Dual Passive 2.4GHZ and 5.0GHZ wireless but you can only use either band you can't use both unlike with the DIR-855 which you can use both bands at the same time. The game router is popular also and helps with online gaming lag which it is aim at more. Has 10/100/1000 GB/s ports for LAN and WAN.
Well you got the info, I hope I've help you understand what's available and what to look for out there. Just need to do you homework before you buy. 
