I tried this a couple of times with the Hagen, and it's more of a PIA than simply lifting the beast and putting it into the upright bag. A side-loader might be much easier to get into the bag, but I would have to bend over with the tuba to load it, and at this age and circumference, I'd rather lift straight up than bend over to the ground.
So... I have top-loaders. Hey, I like my Miraphone bags just fine, I have owned a number of them, and I like their design, construction, and performance, but most of all, I like the PRICE, especially when compared to the others that are 3X-4X the cost. I can't imagine the Rudy being any more of a b*tch to lift up and top load than the Hagen, so if you like top-loaders, and you're not too much of a wuss to lift 25-30lbs that high, get the top-loader. You're a young guy - you'll be able to lift the Rudy for as long as you own it. You already want a top-loader, so quit being wishy-washy and get it. If the $800-1500 price tag on a new high quality bag doesn't scare you off, then you need to get exactly what you want. If you like cordura, get it. If you like leather, get it. Get some wild-assed colors, or get a safe, unassuming color (nod to bloke). And if you really like Gotz, call Bob Tucci and order one.
Pics, or it didn't happen.