The Vibe supposedly is the same amp as the Arc Audio. It has good reviews, but the controls are underneath it, so it may be difficult to adjust it once mounted. The JL HD amps are awesome in every respect. I would say go for the HD if you can afford it, if not go for the Vibe.
Mobridge DA2 > JBL MS-8 > JL Audio HD600/4 > (3) Hybrid Audio L3SE & (2) Rainbow Cal25; JL Audio HD900/5 > (2) Morel HCW-10 & (1) AE SBP15