I can't decide between the Ampeg SVT 410 HE and the HLF version. I'll only be playing a 4 string through it, so I don't know if I need the lower tuning of HLF, and the HE is $100 cheaper. However, the HE has an 8 ohm impedance, while the HLF has a 4 ohm. I would really like to use my SVT 450H to its full potential. Any advice?