most of the time, I avoid using wireless, unless its notebook. I dont have issues with my various notebook wifi. I would rather go with LAN connection where possible; homeplug is a good alternative.
Homeplug may be one of those alternatives but NOT a great one as a buddy of mine wasted A LOT of money buying and replacing these thingys more often than he expected, due to lightning strikes, component failure, what have you. Temperamental performance was the last straw and everything was DUMPED out. At last, spending a few K on total cat-5 wiring all over the home solved it once and for all. Hard to say what product may be suitable for all. Some may incur bad luck with these thingys, eventhough its advertised as next best thing.
Obviously not everyone have the luxury to hardwire their PC's. Of course if you can, I could agree thats the best possible solution to countering and minimizing network woes.
I had to relocate my router to hardwire my LCD TV for some internet features. I couldn't afford the TV wireless adapter as they're rather expensive and multiple times the cost of common and generic wifi adapters. Not that its anything more advanced, just that the TV is insisting on a Broadcom based wifi chip and of a specific model, of course the TV manufacturer have this at their price.
Relocating the router next to TV and a spare network cable from the modem set cost me almost NOTHING!and it works very very nicely, save the turtle speed screamyx.