Well, in your original post, you were saying you were going to spend $140 on the Zotac N230, plus $23 on a USB Wi-Fi. The Zotac N330 costs $170, or $7 more than the combined cost of the N230 + Wi-Fi. For the extra $7, you get: double the CPU power (dual core vs. single core), and internal Wi-Fi with an external antenna connection, which means you don't have to worry about the external Wi-Fi box.
However, if you want to go cheap, then get the Intel D945GCLF2. Dual core Atom 330, but Intel graphics instead of NVIDIA. Only $84 at Newegg (or $59 open-box special), instead of $170. Or the D945GCLF, single core Atom 230, $65 instead of $140. Neither include Wi-Fi.
Damn, thats legit, great reasoning, you convinced me thanks! Once i pay off some bills i start building