My main printer is currently a Kossel (K250V from Ultibots).
A bit of history...
I started with a Makerbot Replicator 2, breaking my teeth on PLA. Looking back, I'm glad I did as I was able to use the printer as-is and knew it was (should) be working fine. Any problems where most likely caused by bad settings. I learned a lot about the process, strenght and weaknesses of 3D printers using this nice (but expensive) printer.
Then I wanted more
I wanted ABS, Nylon, Rubber, metal infused filament
to be continued...