IE and Firefox are the main two browsers I use. Google Chrome seems to work worse then IE for me. But that is because I like to do a lot of things at once and both IE and Firefox are good at multitasking.... Google lags like crazy once you get more then 3 tabs.....
Ah, well... I'm using a laptop and my highest tabs count on Firefox went to around 30 with half of those being videos, and it was still running just fine. Most downloads I had using Firefox at once was 4 and it didn't effect my browsing at all.... Well... it did cause Youtube to go a tad bit slower, but other then that, everything was going smoothly. So I guess it really depends on your computer/laptop/other device that you are using that effects what browser works best.
The only GOOD use of IE! (besides in-game web browsers for MMO's like Pandora Sage) Personally, I prefer to use Linux Pony's IceWeasel install to get the .exe's for Firefox, Opera, Safari & Chrome for 7-tan.
We ALL do the same thing! XD The only thing we do in IE is install Firefox and then soon or later install Chrome! (I did this) Same goes with Safari on Mac cept installed Chrome. :3 Wait is Safari good on a PC? (I have both PC and Mac )