Well this advice is too late for the OP, but I'll offer it up for others who are interested in come-alongs. As stated above, the Hi-Lift is a versatile tool, but you only get a few feet of pull before you have to reset your rigging. A quality come-along is the Maasdam Pow'r Puller. They have a 4 ton model for $190. Like the Wyeth Scott (thread #10), it is in a different league than other come-alongs. It has 12' of cable at the 3 ton configuration and 6' at the 4 ton configuration.
http://www.amazon.com/Maasdam-8000SB-C-3-Ton-4-Ton-Puller/dp/B000PWGRT6 (pictured below)
I would avoid cheap come-alongs. They are more likely to fail when you need them most, and can be dangerous if the break.
If you're going to buy a come along spend the money on a quality unit such as the one above or the More Power Puller (http://cspoutdoors.com/morpowpul.html).
I dumped the cheap come alongs years ago for the Power Puller and have been quite pleased. A thread about the hand winch and additional options to the More Power Puller https://forum.ih8mud.com/winching-recovery/76336-more-power-puller.html.