[RdC911]

I've tried to look for similar questions, but didn't find them, so forgive me (I'm a newbie) if you've read questions like these a million times before...

I've always wanted to buy a classic 911, but this is the 1st time I've been serious about it. I've gone through quite a bit of literature and have seen dozens of 911s' and I'm down to 2 cars to choose from:

My first intent was to buy a 1970 911E in what seems to be its original burgundy paint and black interior, together with correct Fuchs alloys and the late front lip. But then somehow I started drifting towards a white 1975 911S with just 2 previous owners and totally original engine and body...

Taking into account that both cars are in rather good condition, and had fastidious owners in the past.... what do you recommend it's the best buy? BTW the 1970 is 5,000 USD more expensive than the much maligned 1975.

911s are expensive where I currently live (Cancun, Mexico), I originally come from Spain, plus pretty much all the cars I've seen are a complete mess... these two being notable exceptions. They may be expensive by US standards (25k and 20k respectively), but here seem to be priced right.

Also I was wondering how expensive it would be to convert the 1975 911S into European Carrera Spec (as both are US spec cars). I know these are expensive engines to work on, but I don't want to take the easy route and transplant a later unit. I see value on refurbishing its original engine... There was some light blue smoke at start up (not at overrun) maybe not enough to worry about a rebuild, but even so I'd like to 'unrestrict' the emissions.

So I guess the question is: which one will offer the most rewarding driving experience, and the less troubling ownership.

Any advice welcome. I've tried to make up my mind reading countless forum posts, reviews, and articles, but I'm still undecided and more confused by the minute.

Thanks for your help!