I have the:
Silhouette
Gazelle
Cricut Expressions
Cricut Create
For digital images I would go for the Silhouette. It has the most dot on placement for Print & Cut. None of the other machines will beat it. I meant digital stamps. Sorry. I am very tired.
Gazelle & Pazzles are great for cutting out digital images. The problem is trying to import SVG's you really have to jump through hoops and do a lot of converting. With the Gazelle you can buy MTC to cut out the SVG's but there is another software purchase on top of the machine purchase. I do have MTC but I bought it way after I had the Gazelle.
Cricut will cut out any digital cut files but it's not that accurate so you won't get results like you would with one of the higher end machines. I am not saying anything bad about the Cricut. Nobody flame me.
The Cricut was not made for the kind of files out now. It's all math, chipsets, grams per pressure and a lot of other techy geek things to explain it. It's not a bad thing with the Cricut. I heard Cricut is releasing a new machine soon because even PC knows the machine can not handle intricate files as well as the other cutter's.
I have wrote on several threads about the pros and cons on the different variety of die cutter's. If you do a search for my name I am sure a bunch will pop up. They are really long posts, lol. I don't want to subject everyone here to any more torture.