just wondering what u guys run for a battery .. cranking amps wise

for a while my car turned over pretty slow but did it since i got it yesterday after driving for about 2 hours then sitting for about 3 hours she went to start and i lost power on everything about 3 min after i had power again ?? wtf i was pissed lol never had this happen to me so i put some jumper cables on the battery car started fine i said well time for a battery went to walmart bought the best they had for 75 bucks :P 925cranking amps and wow cleaned up the cables and all that good stuff so i had a solid connection and now i just tap the key and she starts barely even turns over lol