Hi SF,
Just seen this thread - another vote for the Makita here. 3" dust port is no big deal, I just got the 3" to 4" converter for £5 from Axminster. Extraction works really well, virtually no chippings on the floor after a big session. Winder thread is metric unlike some others (1 revolution = 2mm). Depth of cut indicator is very useful for establishing initial thickness. Nice repeat cut stop, like the plunge stop on the Makita 3612C router. Fold-out table fine-adjust is by grub screws accessed from above, makes it much less fiddly to tune the table height.
When I looked into this a year or so ago, the Makita won every thicknesser head-to-head review that I could find. I've also tried Noely's Delta and CYC's Electra-Beckum, and I'm very happy with the choice I made (although having said that, the end result is pretty much the same out of any of the decent models as long as the knives are sharp!)
Cheers,
Neil