So I've recently returned to play my old darlings, the Total War games. I first started by picking up where I left, with RTW and MTWII, and the same mods as back in the days, Europa Barbarorum and Stainless Steel. Eventually, after receiving a generous amount of counsel from these forums, I've ended up playing pretty much exclusively MTWII (mainly with EB II and SS). The games were as enjoyable as I remembered, possibly even more so since the mods had developed so much during the years. I even found this awesome guide to make the graphics look better by using a third party filter program. To be honest, I love these games/mods and I will probably be playing them ever after.
This being said, obviously there are some serious limits to these games both graphics and design wise, and so I've eyed the newer TW games for a bit more updated experience. There are two things that are a priority for me in a TW game - my general area of interest is the European antique/dark ages/medieval periods and I always play with total overhaul mods aiming for a reasonable historical accuracy. After a brief overlook it would seem that RTW II is more or less the only viable alternative, since apparently TW Attila has some seemingly weird mechanics that cannot be countered with mods (correct me here if I'm wrong), TW Shogun II has it's setting in Japan and TW Britannia is such a new game that it yet has a minimal modding scene.
The only question I have in mind is that whether it's really worth it? The RTW II Emperors edition is currently on sale at HB at ~17€ which is not bad, but when you count all the DLC the total price will be over 140€, which is a lot of money for a game.