if you decide not to go with a custom cam, i would get one that has a dual pattern meaning that the exhaust lift and duration will be different that the intake lift and duration.
check out ed curtis for a custom ground cam, prices start at about 300. If you want one out of the box the e303, or the trick flow stage 1 is a good way to go for low to mid range power band. With your setup, if you like 2400-6200 powerbands you should look into Anderson's b31 cam.