Hey Mark;
I used a quick-loading spool on my previous M3 & it does speed up loading a little. But to be honest, I would also second Andy's comment that the regular spool is pretty easy to use too. I didn't think there was that much difference between those two spools.
The biggest improvement in loading speed I made on my previous M3 was to upgrade to the M4-M6 loading claw. That was a lot quicker than the previous system, quick loading spool or not. The downside is the expense & finding a competent Leica service person to do it.
Try the normal spool first before you spend any additional dough. Besides, if you're used to a III series Leica, the M2 (with its flip-up back) will seem like it has motorized loading!
Regarding the solid feel of the M2 (and M3, which is very similar) - having used a couple of M3's, an M4-P & several M6TTL's, whenever I feel it's time to change my gear, it always comes down to keeping the M3. When I sold my first M3 to a friend, I regretted it for years. The one that I have now is staying with me.
I hate to go all mushy Leica-mystique here, but for whatever reason, I just enjoy operating the M3 even over the latest M6TTL. I've read Mr. Puts' fine articles, so in my head I know the M6 is a great camera. But to me, the M3 just feels better, advances nicer, and has a clearer view/rangefinder than anything else. Oh well, guess I'm just sentimental when it comes to my M3!
Regards,
Marco