Topband: Getting started on 160

[jsloss]

Am contemplating trying top band this fall/winter with a goal toward chatting, WAS,  and some DX.  Antenna likely will be an inverted L.  As I plan the station a few questions come to mind:

Will 100W be a suitable start of should I add 160 to my HB 572B amp?  Another option would be to put my C-line back in service which will gve a little more power and also solve the "split" concern which follows.

Is working "split" a common practice when working DX?  The 160m station will be vintage gear. 

Thanks,

Joe k7mks
W WA