If you are going to get the well mb08 then I would get the UTG instead.It is called the UTG MK96.
Why the UTG MK96? I have owned both the WELL MB01 (L96) and the UTG MK96, and they are the exact same rifle, except that the UTG cost more, and had a nicer box. However, the original poster liked the MB08, as it has the folding stock, the fluted barrel with interesting flash hider, and the adjustable rear stand... none of which comes on the UTG.
If it were me, and I wanted the L96 look, I would go with the TSD SD96 (same as the UTG MK96) because it has a metal trigger box, and upgraded piston, spring and spring guide... for that matter, I am rather partial to the TSD SD97... same features, but the rifle sports a unique stock.
As for an M24 variant; get the CA for best replica, or get a JG BAR-10 for an M24 wannabee that has a slew of upgrade potential and support.
Shop around, because after all, it is only and airsoft rifle, and after spending a huge chunk of change upgrading one, in the end.... it is still just an airsoft rifle.
Be careful about listening to the hype that "you have to upgrade" a bolt action in order for it to be any good... why? because your airsoft rifle becomes a money-pit project that will suck the life out of your bank acount, and in the end you can't hardly sell the rifle for what you have in it.
My advice; buy a good rifle like the MB08 or the CA M24 or the TSD SD97 (my favorite) and accurize it. Sometimes just cleaning the rifle and tightening all of the screws will be all you need to do. Sometimes you will need a barrel and hop-up rubber... after that, just replace the parts as they break... this in and of itself is costly enough. The need for a triggerbox that costs %125 more than the actual cost of the rifle is rediculas... not for me.
My son owns a WELL MB01 that he bought three years ago. I cleaned it for him, and replaced the vaseline like grease with a good silicone grease, and then I teflon taped the known leaky areas... the rifle hits hard and accurate with the stock components, and it is easy on the arm to cycle the bolt... best $115 ever spent.
I digress, I'll let someone else poison your brain now, I'm all out...