Basic 'inexpensive' stainless kitchen knives can be very easy to maintain, using nothing fancy. Most will perform better with a coarser finish ('toothy') as the steel is usually a bit soft to hold a very fine, thin & polished edge very long.
I've had good results with:
- Inexpensive Norton 'Economy' stone (Coarse/Fine double-sided) found at home Depot for about $7.00.
- Inexpensive Sears pocket stone in aluminum oxide, about $2.50 (unless it's on sale).
- Wet/dry sandpaper wrapped around a dowel; 220-600 grit suits these knives pretty well.
- Medium/Fine diamond hones, which will leave a lot of toothy 'bite' in just a pass or two.
- I've even had good results on kitchen knives with a 'tile rubbing stone' found at Home Depot or Lowe's, also about $6-$8 or so.
ALL of these options are similar, in the toothy bite they leave on simple & soft stainless kitchen knives; that works very well with food chores, including tomato-slicing and such. All should be used with a very light touch, to minimize burring (soft stainless is prone to this).
David