I suppose Sreekanth's latest post on "Movies i liked" thread explains everything about the quality and what you can expect when you order a DVD from an online store which is USA based.
Payment part is also understood by you i guess.
Now about the delivery, i cannot tell you anything being 100 percent sure but few of my friends have ordered audio cds from online stores and they did not have any issues at all
Still its better if you hear from someone who has himself ordered a dvd from an online store and has asked it to be shipped to india
If you want to have a feel as to how those region 1 dvds perform, try going to a dvd library near your place
Generally all these dvd libraries have region 1 dvds, but you wont get the desiered edition (unirated, limited edition, widescreen, etc)
They will just have what they could source.
I know you dont like using rented dvds but try it once and you will know how good they are
Can you wait for a day or two? I am posting a detailed message on NTSC/PAL, DVD duplication etc. Please read that before you start importing DVDs.
Paypal is one of the safest way to transfer your money to the seller. All your credit card is processed through these payment gateways . there are also ccavenue which is also a trusted gateway. But most of the sellers use paypal . I have paid through paypal in many occasions to get Cds online,.
But regarding the transport God only knows , that risk you have to take.