Hi Mick,
I have a set up not that far removed from yours and I use the following software:
- EQMOD (with ASCOM Platform for Telescope Control)
- EQPAD (Plugs into EQMOD to give you control of the telescope with a game pad).
- Cartes Du Ciel (Free Sky Chart Software that is ASCOM Aware).
- PHD Guiding (Again Free and plugs into ASCOM for pulse guiding).
- Backyard EOS (to control Camera and Imaging Sessions, your camera would need a serial adaptor to control Bulb Mode, alternativly just buy a bulb timer for your camera, its also quite cheap)
- Alignmaster (to help with polar alignment as it is ASCOM compatible, easy to use and cheap).
The paid for software comes with Trials so you can check them out prior to purchase (just google the name and you will find them).
As for MAC or PC, I am a PC man so I can only vouch for this software on a PC. But if you have an old Lappy it should easily run this stuff as it's not that taxing on a computer.
I hope this helps? I am in Brisbane so if you got really stuck I could catch up with you help get it all working.
Cheers
Anthony