I have the 12", which is large enough to meet all my needs. At $265 this is a considerable investment for a hobby. However, most paper crafters buy one trimmer after another, replacing blades, etc. Once you buy the Genesis, you are done. In the long run, it is a money saver. It has a metal blade cutting on a metal strip. The Genesis is sturdy. It is not lightweight, so it doesn't move when you cut. It cuts one piece of paper perfectly.
With space at a premium, I prefer small ink pads. Versa Magic is a fast drying (think 25 seconds) pigment ink that provides excellent coverage on solid stamps. It is juicy (a baby wipe cleans stamps the best). It leaves a slightly chalk finish that reminds me of A Muse or Fresh ink. And $2.50 or less per dew drop. LOVE
This is a terrible photo of the best stamping tool invented in years. It is pricey (you can get it directly from My Petunia for $50) but Simon Says Stamps is selling for $70. Hard to find as production is slow, but worth the wait and the $$. I have saved more cardstock since I started using this because placement of your stamps (clear or cling mount) stays the same through multiple stampings. No more uneven stamping.