By "wrt", I assume you mean either dd-wrt or openwrt (third party firmware) compatible. That's always been my favorite solution. However, I’m always a wee bit reluctant to recommend such routers to ppl since it involves changing the firmware (which brings w/ it some risk) and perhaps more complexity than the average user is willing/able to absorb. I just never know if I'm dealing w/ a total newbie, or highly experienced user.
If you’re willing to consider dd-wrt (or tomato, another third party option), it will run you about ~$30-33 (probably w/ a rebate). I don’t know whether you need wireless G or N, but my current favorite wireless G dd-wrt/tomato compatible routers are the ASUS WL-520GU and ASUS WL-500GP V2.
http://www.newegg.com/Product/Product.aspx?Item=N82E16833320023
http://www.mwave.com/mwave/skusearch_v3.asp?scriteria=AA76258
The WL-500GP V2 is actually the better deal, not just because it’s cheaper, but it’s really the WL-520GU on steroids. You rarely see the WL-500GP V2 below $50, even w/ the best deals, so $30 AR is excellent. And again, you can use either dd-wrt or tomato firmware. And ASUS routers are much harder to accidentally brick since they employ a special recovery mode for firmware installation (oem or third party). These routers even include USB ports so you could use them w/ external storage and/or for print serving. But again, these are wireless G. If it matters, I own one of each.
If you need wireless N, although I don’t own one myself, I’d have heard some good things about the ASUS RT-N12 w/ dd-wrt/tomato. Just like the other ASUS routers, it uses a special recovery mode for firmware updates. Best price I seeing now is ~$40, but it has been as low as ~$30 several times over the past few months, which is a really good price for a wireless N router w/ third party firmware support.
If you want a device that support wireless ethernet bridging w/ the native (oem) firmware, there are a few options as well.
http://www.amazon.com/ZyXEL-P330W-802-11g-Wireless-Router/dp/B000AAQQBC/
http://www.amazon.com/ZyXEL-WAP3205-Wireless-Access-Ethernet/dp/B002LITI7K/
I don’t necessarily consider these great values, or something I personally would buy, but for someone who just doesn’t want to mess w/ third party firmware (either installation or configuration), feels intimated by the process, etc., at least it’s an option.
Finally I have one remaining option if you’re feeling particularly adventuresome. Verizon is currently selling the Westell 7501 wireless router for $10 shipped! It’s nothing fancy, but it does the job. But what not everyone realizes it that it can be “hacked” into a wireless ethernet bridge. I’m using one right now to support a Linux PC.
http://slickdeals.net/forums/showthread.php?sduid=25485&t=2232477
A helluva deal if you’re interested in saving a lot of money, but again, you will have to get into a little bit of hacking (strictly software changes, involves no hardware changes, not even firmware changes, so perfectly safe). Probably not the right solution for most ppl but I thought I’d mention it, just in case you might be interested.