Hi emilkarlsson,
I'm 17 years old and received a RapMan 3.2 for Christmas this last year. If I were to buy a printer today, not owning the RapMan, I would probably have chosen the replicator for a number of reasons:
The Replicator is pre assembled, while the similarly priced RapMan requires assembly. This is no small project. It took me four long days of work to get it assembled and I'm still struggling to get it printing.
The Replicator uses 1.75 mm filament while the Rapman uses 3 mm. Recently the trend has been for the use of 1.75 mm filament over 3mm, so it should be easier to find filament for your printer.
I don't know about the slicer software for the replicator though. The RapMan has a great program called Axon that is based on the same software as Makerbot's program Replicator G
Finally, they both will require lots of tuning, tweaking and assembly as you work with the machines so be prepared to do lots of problem solving! These machines are the bleeding edge of modern technology so be ready for problems.
For a great blog with tips on DIY 3d printing check out:
http://richrap.blogspot.com/
Another blog I look at frequently is
http://fabbaloo.com/ which has daily updates with 3d printing news.
Let me know if you have any other questions, I have been researching personal 3d printers for a while now.