We like the sound of it too, honestly there's been comparisons done and the DMG comes out on top. Not to mention the price is generally lower than other ones, it has a bit of a heft to it and feels like an instrument in your hands. It does have a slower processor than newer versions but a little trickery in your programming can get around its limitations.
To be honest, lots of guys don't mod their DMGs at all. I personally have the prosound and backlight on a few of mine, but I did them by hand and they're not necessary. I have a few standard DMGs for writing on buses, etc too.
So I guess tl;dr - theres some benefits, but its not as if you NEED one. Your SP will do the trick.
does anyone know if LSDmanager can handle the multi-savs? otherwise, is there a different way to manage the individual songs in the different sav banks once you get it backed up to your computer?