But seriously folks
Back when Consumer Reports tested ironers (1940's through about late 1950's), the brands with shoes under the roll (Ironrite and Bendix) always scored highest for ease of use and best results.
What are you going to be ironing most?
Flat plate irons can give good results with things like shirts and small linens such as pillow slips, napkins, etc... But for large things like sheets and tablecloths things can be tricky.
Few take away points:
Back when ironers were first introduced onto the domestic scene housewives were advised to get one with a roller at least half or quarter wide as their widest linens. The idea was not to send things through ironer folded more than in one half. Of course back then you could get ironers up to 42" wide for home use. That ship has sailed. Widest in the 1950's were those offered by Frigidaire, Conlon, and Maytag at about 32".
If you plan to do bed linen or large tablecloths you either have to pass the thing through four or more times to iron it all with only a center (or no) crease. This or fold the thing into quarters and thus have ironed in creases. There is no way around this again because of roller width offered on ironers.
If you aren't going to be ironing lots of heavy old linen or cotton fabrics, thus don't require high heat, then the Miele rotary ironer should be fine. If not in a rush you can wait until one comes up on offer cheap (eBay, CL, or whatever), then pounce.
Of vintage ironers sold today I'd suggest going with an Ironrite, especially the last few models with the 95 being best.
Say Ironrite because it is probably the only vintage ironer out there you can still source parts and plenty of service information.
Because Ironrite ironers had two open ends IMHO it is far easier to manage many things, including shirts than others.