the pioneer 4x10 is a good speaker but its an excellent speaker if you have a sub making all your bass do you have the 2 way or the 3 way 4x10's i have the 3 ways and im 100% happy with them (but i do have a sub making all my bass). as far as fronts go the infinity is a decent speaker but i have had a lot of customers replace them with the pioneer speaker cause the infinity usuially last about 2 years before the surround seperates from the basket, the pioneer is not as clear as the infinity so in my car i used the pioneer 3 1/2's and a set of 2" pioneer silk dome tweeters on the "A" pillar which in my opinion sound better than the infinitys one thing i cant stress enough is if your useing an aftermarket stereo and your not using a crossover you must use bass blockers on the front speakers those little 3 1/2's dont like bass the 6x9 converter can be bought at any competent stereo store when i have them in stock they sell for about 19.00 a set but i have seen them as cheap as 14-15 bucks
