Maybe an MSD, Sheave or OD weights.
Never used wheel spacers, so can't help you there.
I run 26" Swamplites on ITP aluminum wheels with good results, lot of trail riding and mud here, so works for me. The taller the tire, the more low end you will lose.
I just stepped up to a 4500 lb KFI from a Warn 4000 lb that I fried the motor on. They wanted $200 for a replacement motor. Bought a bigger KFI for $309.A hell of a lot cheaper than the Warn, practically half the price.
Extreme 3" lift
ITP Aluminum Wheels & 26" AT 589's
Complete Skid plate set
KFI 4500lb Winch
Pro Armor SS rear bumper