If you're on a budget, I can give you some recommendations. Please do not fear IR, while they're certainly there, there's no danger. I would worry more about input lag since you will be using your Wii. Wii, as you know, outputs in 480p resolution, but today's 720p plasmas only have native resolution of 1024*768. They used to make it in 1368*768, but not anymore. Many of Wii games, if not most, supports anamorphic resolution, which means blowing up 4:3 aspect ration into 16:9. Today's 1024*786 720p plasmas work the same way. They have 4:3 native resolution, but because the pixels are wider, they're automatically blown into 16:9. This actually works the best with the Wii, since upscaling 640*480 SD image into 1024*768 will take minimal fuss, and you will automatically enjoy the benefit of anamorphic pictures. I've tried many PS2,Xbox,Gamecube,Wii,Dreamcast games with LG 720p plasma and SD games look wonderful, and widescreen games work the best. With Xbox360 and PS3, the image will lose some clarity as it will be downscaling.
Panasonic X5, Samsung E450, LG PA4500 all are great displays on their own. If you're looking for a reliable product, you can't go wrong with Panasonic. If you want great picture out of the box, the Samsung E450 will be the best. If you don't mind little tweaking, a black tweaked LG plasma will give you a flagship picture quality at a bargain price. I had LG PT550, which was a two year old 720p plasma, and while stock picture quality is only ok, they became phenomenal and competed well with much more expensive Samsung E8000 plasma once its black was tweaked. The TV actually became more reliable after the tweak. No more IR, brightness fluctuation, and the panel became very cool to touch. LG plasmas typically don't buzz so I didn't notice any changes with buzzing. I would have kept it if only its input lag was little better, but 58ms can be tolerable to many people. The Samsung plasma can also be tweaked for better black btw.