You don't want a cheapo
If you are going to Siberia, take along not one, but two of the very best reels you could afford. Its a trip of a lifetime and you don't need your gear to fail you. You might even consider doing some preventive maintenance. For example, one day the handle on my reel came off (while fighting a fish!!). Threads were buggered such that it was irreparable in the field and my day was done. I have since remedied this by carefully placing a drop of Loctite on the inner side of the threaded hole in the reel. I would recommend you do the same. Be sure to have a screwdriver that fits the screws on your reel. Learn how it works so you might be able to repair it afield.
Depending on the rod you purchased you will need a reel designed for 8 to 10 wt rods. For Siberia, my choice would be to bring two identical reels with a sealed drag. As regards lines, if you are a duffer, take an hour's lesson using a Skagit head (not body, head). One could have two or three heads for a single reel. While I hesitate to suggest it, my faves in the inexpensive but very good reel department are Lamson reels - a Lamson Radius 3 or 3.5 would be just the ticket. I believe Lamson discontinued the Radius, but you might find them on ebay.
Siberia - the very name elicits cold war images of gulags and missile batteries. Huge area, mostly undeveloped. The fishing is likely to be stunning. I'd bet you'll have an amazing time. Good luck.