I had the pleasure of owning/shooting a DE in .44 Mag for about two years. It was an older IWI gun, built in 94, in very good condition.
When I purchased it, I gave it a good cleaning and lube. Took it to the range and it fired flawlessly. I used Winchester white box .44 ammo, 240 gr soft tip jacketed. I never had a FTF/FTE.
Due to the weight of the gun and the gas system, I found it an easy gun to control. Years ago I owned a S&W 629 with a 6.5" barrel and I recall that gun being more 'violent' and 'severe' to shoot when compared to the DE.
My DE had an adjustable rear sight. Off a rest, I could hit a 12" steel gong on a regular basis at 100 yds., by adjusting the rear sight a tad. At 15-25 yds I'd adjust the rear and using a two hand, free stance, the gun would group very well if I did my part. The DE .44 is a very accurate gun, I'm fairly sure the trigger in mine was stock and it was very light/crisp. I DE .44 about the same to control as some of my .45 ACP pistols (Sig 220, H&K USP).
I found the gun a 'hoot' to shoot, providing some great entertainment, but yet it is still an accurate, manageable pistol.
Unless you reload, ammo can become expensive. Depending on the day, I could easily go through 2-3 boxes of .44 in no time! However, it's a 'bargain' to shoot when compared to the .50.
I'm not sure I'd begin with a DE .44. I'd tend to suggest starting with a good quality, reliable 9 mm, so you can practice, practice and practice some more to hone your pistol shooting skills.
IMHO, one can't go wrong with the likes of a Sig P226, or a Glock G17. Bulk 9 mm ammo costs much less, so you will get to practice a lot more. After shooting hundreds/thousands of 9 mm, you will become more familiar with proper grip placement, controll of the gun and developing your target/sight placement, etc., etc.
After this, transitioning to larger calibers is a lot easier to do.
Perhaps put the DE on your "want to buy" list.
That's my 2 Cents!!