The pepper/OC spray is a good idea. I am looking into getting some, but I haven't decided what brand to go with.
With the Taser the civilian model that I'd go with is the C2. There is also the X-26c, the civilian model of the unit the LEO's use. The C2 is smaller and in my opinion easier to cary. The X-26c resembles a handgun and might be confused for a firearm by a LEO at first glance. The C2 looks more like a flashlight or a Type II Phaser (Sorry. That was from the Trekkie in me). You can get the C2 in a kit that includes some practice loads, a target, and a holster. I believe that it is set up for a crossdraw from a position about 10:30 on the belt.
Just make sure that if you go with a Taser that it is legal for you to own and operate. As an example, for me in NC I can open carry a Taser, but cannot conceal carry it. My conceal carry permit only allows me (in NC) to conceal a handgun, but no other weapons, and NC law states that Taser and "other similar devices" cannot be concealed. Just be careful and make sure you stay within the law for you area.
Be safe with whatever you go with.
Kershaw Shallot 1840, Kel-Tec P-3at, Kel-Tec PF-9, Glock 17, Glock 19, Glock 26, Kel-Tec SUB-2000 9mm (Glock 17 mag compatible), Maverick Arms 88 Security 8-shot 12 gauge.