Count me in for a 1/48 Monogram Spitfire Mk. II, and a 1/48 Monogram ME109G.
As for a start date, you can start today.. You have to be on board prior to 31 March..
But about your choices.. Kinda got some bad news.. Those two kits weren't originally Monogram kits and... Revell first released them in 78.. The 1960s and early 70s issues of the Mk IX Spitfire and Me 109E (both featuring the retractable landing gear and no cockpit) were the only Monogram variants of those types...
Here's the Monogram Me 109E:
I don't have a parts breakdown of the Spitfire kit photo'd yet, but the parts-count is about the same as the '109 (and the pilot figure is identical).. The box art is the original release, but I think there was a "white box" re-issue in the 70s..
While there IS a Bf 109G-10 kit that DOES have the Monogram label on the box, it originally started out as a Revell kit in about '78, when Revell and Monogram were competetors... Since it wasn't initially a Monogram-mold kit, it's a "re-box", rather than "re-issue", and thus misses the afore-mentioned "Spirit of the Build"..
The current Revell Catalog showing a Spitfire Mk IX isn't the original Monogram Spitfire Mk IX kit either. Although I have no idea who first put it out, it too is NOT an original "Monogram-molded" kit..