Option 2 is the best what you can have, but comes at a extra cost, You can go with the Blue series
2TB WD20EZRZ 540RPM SATAIII 64MB $70.00
3TB WD30EZRZ 5400RPM SATAIII 64MB $96.00
The dis-advantage is the 5400rpm, unlike their 1TB Blue option that has 7200rpm, but benchmarks report that they have the same speed
2TB: Black vs Blue
http://hdd.userbenchmark.com/Compare/WD-Blue-2TB-2015-vs-WD-Black-2TB-2013/3521vs1821
Now you have a cheaper acceptable option, decision is totally yours