the best e-file i have come across is expensive but very well worth what you pay for. the one which i currently own is the young nails yn-99 model. this e-file is amazing!! the first thing i love about it is the size. it doesnt take much room on my desk. it has a built in holder for the hand piece (also comes with a second one seperate) and for bits. the controls are all flush push button, so no knobs to break off. the hand piece has a twist lock center for fast bit changes and is very light along with absolutely no vibration!!! less problems for carpel tunnel that most techs suffer from. there is an option foot pedal if you wish to buy that. the BEST feature is that you NEVER have bog down (slow down when using like most e-files) so you never have to go to very high rpm...i can do all work in the first two settings for speed(light one has 3 speeds-i use the third speed in light one for most jobs and the first speed in light two for heavy work...i dont need faster rpms because it doesnt slow down with pressure). the other thing i love about this e-file is that on the low settings its not going to cut the clients skin, i had a demo done on me, you can literally run the e-file at speed 3 in light one and not damage the skin!! i can get right to the cuticle area without cutting it!! i LOVE this e-file...you won't find me with anything other. the cost is $450.00 uds but very well worth it.
hope this helps you out.
kristi