I already own most of them, but it's a decent bundle for someone missing the meat and potatoes there. :)
The only games I'm really missing now are the XCOM Enemy Within expansion pack, and that The Bureau spinoff game, Civ IV, and of course the new XCOM 2 that is coming out soon. Hopefully they'll show up somewhere in a bundle or individually super cheap sometime.
Psst, I can save you some dough and help you get your Xcom fix in. Just buy Xcom:Complete when it goes on sale for $7.50 again. Hasn't been that low recently, just $10? Okay, for $10 you get XcomEW + LW (Long War Mod).
LW has options for the ability to win back countries that have defected, larger teams support (I believe up to 10), much more specialized team members, more specialized weapons, and a great deal more benefit to the EW enhancements. To balance all this out, you have to take some penalties:
1) Soldier fatigue - they get tired going on mission after mission, and require leave (non-mission time to recover), so you will need a much bigger pool of solders.
2) Recovery time (from anything) seems much slower
3) There are LOADS of enemies. Actually, a group of enemies is called a 'pod' by the modders. In the base game basic level, you can expect 2 - 4 enemies per pod. With LW, you can expect 6 to 10 enemies per pod, and since their 'level' is determined randomly, there's a higher chance of interacting with higher level aliens. Especially on terror missions. You can almost expect to lose a soldier per mission - minimum. If there's an alien boss involved, you *will* suffer losses. Best I've been able to do so far is only lose 2 people, and that's with extensive save scumming (with RNG reload each time).
4) I believe the research tree has been reworked a bit, to keep you from getting alien weapons too early.
5) Game still makes me want to put my fist through the screen when I miss 5 90%+ shots in a row. One of them from 3 feet away. With 95% chance to hit - while flanking the alien. Probably realistic. What happens next is the alien does a two-step to the left (flanking you at one step away) and gets a critical hit for 10pts.
If LongWar is too long for you, there's an option for a NSLW (NotSoLongWar), so you can get all the goodies from LW in a shorter timeframe.
TL;DR - If you liked the gameplay of Vanilla Xcom, but desire a more protracted battle (6 months? a year?), try long war. It definitely can give you 'Just one mroe turn' feel that you can get from any turn based game.