Before I added a second set Forte IIs to the rear I used a pair of KG 3.2 and also a pair of KG 2.5s.
For movies either of those worked great but for listening to music the Forte IIs are definitely an improvement
I tried a Forte II as a center but it was too big to work well with my HT/TV stand set up. I had a KV 2 first, then went with an Academy which I love, much better than the KV 2. I tried the Forte II next but went back to the Academy because it fits so well below my 52" TV. But for the price of an Academy I'd agree if you have room for a Forte II up front that would probably be the way to go. I think you'll find there are people running all Forte speakers in a 5.1 setup that are very happy with it. I'm thrilled with Forte IIs front and rear with an Academy myself only because of space issues. If I ever mount my TV to the wall I might go back to a Forte II at center.
HT:
Mains: Forte II - oak oil, DeanG crossovers, Crites titanium tweeters
Center: Academy - oak oil, DeanG crossover, Crites titanium tweeters
Surrounds: Forte II - oak oil
Sub: 2 Sub-10's
TV: 52" Sony KDL52W4100
Blu ray/DVD/CD/Netflix/Pandora: Samsung BD-P1600
A/V Rec: Yamaha RX-V663
Amp: Emotiva XPA-5
Panamax MAX 5300-EX
Harmony One remote
Two channel:
Cornwall - C-BR painted black : (
Extra stuff:
KG-2.5 - black