I have a WRT54G v4 that seem defected so i called Linksys to get a RMA. They sent me a WRT54G v5. From what i understand with the v5, you cant run 3rd party software (which have some fixes for P2P stuffs). I dont know if i should keep the v5 or the v4. Any suggestions? P.S can we still buy the v4 from stores like best buy, compUSA, etc...?