Personally I would like to buy a router by TP-link, Netgear or Zyxel. May be Mikrotik (I have a RouterBoard 951G-2HnD), but it's a kind of special thing. But not D-link and ASUS...
DSL-2750E should be able to act like a bridge (see 3.2.3 section of it's manual), also it can handle 3G connection in case of your ISP internet access failure.
Lynksis WRT54GL should be able to be a bridge too, but even if not you can flash it with DD-WRT and then it should.
MicroNet SP608K can't do Wi-Fi, right? Sure if you have it once you may use it.
3Com SuperStack 3 Switch 3300 XM - oh, sure you can use it when you'll have a 20+ miners in your farm.