one button remote start options

I really like the Valet 561R (I believe thats the number).

Its made by DEI and comes with 2 3 button remotes.  I have one on my wifes car and I've been very happy with it.  Great range, very reliable.

If the Cherokee has power door locks, a R/S with keyless isn't that much more than a one button R/S.

Take a close look at the Ultra Start models.  They are good quality, have basic but nice features that are easy to program without special equipment, have excellent range, and are inexpensive.  Right now on EBay there are a couple reputable dealers auctioning brand new "in the box" units for around $35.  (The G11-XR unit has a range of 1500 feet and comes with 2 four button remotes.)  Here is the Ultra Start web site : http://www.ultrastarters.com/products2.html

I have purchased a lot of items thru lessco electronics, some directly from their WEB site and others thru EBay.  They ship fast and I have never had any issues with the products.  Its a good way to try a new item from a different company without buying in bulk.  ( I switched to IDatalink bypasses that way. )

I have installed many of the new Ultra Start units the last couple of years.  1250, 1270, 1272, 1280, and some G11 series.  The time length adjustable horn output is nice, as is the windshield mount antenna with the flashing LEDs and the Pit Stop function is handy.  Their manuals are easy to follow, the option programming is straight forward and I've never had one come back.

Sometimes it all comes down to what you feel comfortable with, or the features, or the style of the remote.......  All of the major brands are good.