Base rMBP is more than adequate for the average user if you are using heavyweight graphic apps then 16Gb is worth while. CPU`s less so as the iCore CPU`s there is little real life difference unless you will be "pegging" out the base 2.3. In general Apple`s BTO options are very much overpriced and you will be lucky to see 10% return on the additional cost when sold. Those that can moniterize the BTO options, the additional cost make sense as even a 5% increase in productivity is worthwhile .
Storage is what you need on the move, for me 256 is more than enough for all apps and current work, plus i carry a small 1Tb external with me as well. At home i have over 10Tb of drive space so no matter what size SSD Apple offer for the rMBP it`s academic for me.
Every iteration will be an improvement, just a question of when you want to jump in. Personally i went with a base 2.3 and will upgrade to Haswell next year, the base model will hold the highest percentage of retail price and will be easier to move on.
Storage is what you need on the move, for me 256 is more than enough for all apps and current work, plus i carry a small 1Tb external with me as well. At home i have over 10Tb of drive space so no matter what size SSD Apple offer for the rMBP it`s academic for me.
Every iteration will be an improvement, just a question of when you want to jump in. Personally i went with a base 2.3 and will upgrade to Haswell next year, the base model will hold the highest percentage of retail price and will be easier to move on.