I know most people here are big Demarini fans but I got a chance to play around with one a couple of months ago and I personally think the 454 has similar pop but has a bigger sweet spot and slightly better feel than the CF4 (I have not had a chance to try a CF5). Also, Worth is known for their durability but people have complained that the painted graphics chip. Last season I was trying to convince my dd to get a 454 but after she had a composite bat explode on her she chose the Worth Toxic, which is a composite bat with a metal-sleeved barrel.
Len