West Africa on a X...T,L,TZ, which one??

[nadir]

Hi there!!

This is my first post, though i've been here for a while... I'm planning a trip to West Africa (I live in Spain) for next fall/winter. It will be my first motorbike offroad trip, and i'm thinking about the right bike to get (as everyone at first I guess!). Currently I own an Enfiled Bullet 500, but I'm not thinking about taking it there (I know some people do...) I'm 1.80m tall (6 feet), 23 years old.

After weeks of reading and researching I have come to the point of narrowing my choice to three bikes:

- 1987 Honda XL600LM (red engine, 28 liter tank...)
- 1999/2002 Yamaha XT600E
- 1988/90 Yamaha XT600Z Tenere 3AJ

The reason for this choice...well, I'm looking for reliability, relative lightness and, of course, not to empty my pockets!!

The pros and cons of each bike (not regarding luggage), as I see it, would be:

- XT600E (would get it with around 12000-20000km for 2900-3300 € plus "teneresing")

LIKE: easy to get here in Spain, newer than the other two (less km), lots of accesories, reliable, oil change every 10000km, light?? (156kg dry)
DON'T LIKE SO MUCH: need much to go (acerbis tank, bashplate, windshield...) so more money, it is more expensive than the other ones.

- XT600Z 3AJ (around 30000 km and 1000-2000 €)

LIKE: fairing, looks, reliability (even with age?), needs almost nothing to go, 23 l tank, cheap, cam get it in Spain
DON'T LIKE SO MUCH: heavier (165 kg dry), older and probably 2nd or 3rd hand (who knows how its been treated), hard to find accesories for it (racks!!)

- XL600LM (around 35000-40000 km and 1500-1700 €)

LIKE: big tank, kick+electric start, light (155kg dry), not expensive, doesn't need much to go, maybe a windshield

DON'T LIKE SO MUCH: hard to get (Germany!!), old, is it as reliable as the others?? oil changes every 3000km, no accesories (racks!!)

So...now the questions!! Basically, it is simple: What do you think? What would you do if you were me? I know every newbe asks the same thing, and some of the "experts" might be a little tired of the same thing again and again... I hope it's not a nuisance anyway...

Thanks guys!!

nadir