I like this one myself http://www.ultimatepassage.com/cgi-bin/up/31408.html
The point of separates is a valid one. Have a friend here in the install biz...all he carries is Furuno. We trade out a lot, so Furuno it is. Speaking of Lowrance....that X-16 paper unit was a honey...and a premium on them nowadays if you can find one. http://www.lowrance.com/Products/Legacy ... per-Graph/I'm pretty sure I have an X-16 paper graph if anyones looking.
Anyone familiar with Si-Tex model 650. Looks like it's got good reviews, very similar to the Furuno 620 but screen is larger and about $200 less than the Furuno. Furuno is very popular in my neck of the woods, don't know much about Si-Tex.