On a slightly more realistic note, in practice "better quality glass" means a six-element enlarging lens. There is little to no difference between an APO and non-APO lens in that range, especially if you don't do extremely large work and/or color work. In my opinion investing in an Orthoplanar for home enlargements is money thrown out of the window unless you also invest into a laser alignment system to make sure that your base board and film carrier are 100% (as opposed to 99.9%) parallel and into a concrete stand in your cellar to make sure it's vibration-free. In practice, I'm sure none of us actually needs it.
So a three-element lens would be crappy, a four-element lens would be mediocre to good, a six-element lens will be excellent, and a six-element APO lens would have the potential to be slightly more excellent in very demanding situations. But the difference of an APO six-element lens over a non-APO six-element lens is not significant in practice and even less so for a beginner.
I think "just excellent" is enough. Due to the collapse of the home darkroom market, excellent six-element lenses such as the Rodenstock Rodagon, Schneider Componon-S, Nikon EL-Nikkor can be had used on eBay for 30 to 50 USD - these are lenses that cost $500 new. If you are lucky, you can get along for less than this; I paid 12 EUR for my Rodagon 105 and consider this by far the best value I ever got on any photographic device. An APO lens on the used market will cost about four times as much with little added value, so I don't see the point in that. An APO lens new will cost about $800 over here if I remember correctly. So a new APO lens over a "just excellent" non-APO one on the used market corresponds to at least ten times as much money without delivering any significant bang for the buck. While it's nice to speculate about how an Orthoplanar would be nice, I think this is just gearhead talk (I like gearhead talk, but I don't want to base my buying decisions on it). Get a six-element lens and be happy. It will be very, very long until you discover any limitations, if ever.
Philipp