I'm currently printing with an R2400 and lusting after a 3800. Lately, I've been using Harman MP fb matte as well as Crane Museo Max. I've also got a package of Museo Silver Rag awaiting testing. I'll be interested to see the results, especially on K3 inks.
A warning on the 2200 from someone who used to own one (me). The 2200 was notorious for color shifts under various lighting as well as brassing when printing straight black and white. It might be different with "toning" the print in Photoshop or depending on the paper. However, it produced beautiful color prints. Just keep that in mind.