I currently own a 17" MBP and iPad. Since getting an iPhone, I feel that the iPad is rather redundant and I have been thinking of other options. I like the light weight and battery life of the iPad, but for web browsing and watching youtube, netflix, hulu, etc, a netbook or laptop is better. When traveling I often end up carrying both the iPad and 17" MBP. I also have a windows laptop from work, but the battery life is abysmal on it, and it's not a mac 
1. Replace iPad with Macbook Air (2nd Gen).
Pros: Light, portable, full keyboard,
Cons: Cost, MBA Battery Life, MBA expandability, 2 laptops seems redundant
2. Sell iPad and 17" MBP. Buy 13" MBP and iMac/PC Desktop
Pros: Perfect balance of portability and capability. Long battery life, MBP expandability
Cons: 13 MBP is still almost 5 lbs, old Core2Duo, low screen resolution
3. Live with what I have
Pros: high performance when I carry my 17" with me, lowest cost, lowest effort (already have it), ipad is better for some tasks (games, kindle)
Cons: 17" is heavy and shorter battery life. iPad isn't as versitile as a laptop.
4. Other options?
1. Replace iPad with Macbook Air (2nd Gen).
Pros: Light, portable, full keyboard,
Cons: Cost, MBA Battery Life, MBA expandability, 2 laptops seems redundant
2. Sell iPad and 17" MBP. Buy 13" MBP and iMac/PC Desktop
Pros: Perfect balance of portability and capability. Long battery life, MBP expandability
Cons: 13 MBP is still almost 5 lbs, old Core2Duo, low screen resolution
3. Live with what I have
Pros: high performance when I carry my 17" with me, lowest cost, lowest effort (already have it), ipad is better for some tasks (games, kindle)
Cons: 17" is heavy and shorter battery life. iPad isn't as versitile as a laptop.
4. Other options?