I'm also trying to decide on a combat system, and have more or less decided to use a modified Striker system. What I did was to make the Personal Wound Table a little more granular, thus dampening the effects of the explosive round rule, while still letting it operate:
Die roll Wound Effect
3 or less None No effect
4 Graze Morale check or must evade next turn
5-7 Light Wound -1 wound penalty to skills, movement and morale
8 Moderate Wound -2 wound penalty to skills, movement, and morale
9-11 Serious Wound Out of battle and unconscious
12 Mortal Wound Out of battle, unconscious and likely to die
13-15 Dead Out if battle, probably permanently dead
18+ Destroyed Out of battle, body blown to bits
Hits caused by explosive rounds (HE, HEAP, KEAPER, CBM, laser and energy weapons) are increased one wound level after die roll with PEN/ARMOR modifiers are made, unless the result is No effect.
I haven't quite worked out the rules for healing up from wounds, but do imagine that high tech medical care should have at least a chance of fixing mortal wounds and probably a chance of repairing even a "Dead" result, but not obviously a "Destroyed" one.