Best option for my big front teeth?

Pictures are very important when discussing your current smile and cosmetics.....but the proper shape of your two front teeth should be proportional with your other teeth, what we call The Golden Rule of Proportions, some base this on Phi.  If you make them smaller you will have spaces unless the adjacent teeth are also modified....so I would recommend your dentist propose your options which might be something like these 1) crowns on the two front teeth with veneers on the adjacent or 2) IPR-reduction/enamelplasty to re-shape teeth naturally concurrent with Invisalign/ortho to close any spacing.  Maybe the two front teeth are the correct size but the adjacent teeth are too small....Good Luck!

Hi:
Unfortunately without photo and X-ray it is difficult to give you accurate advice.  Please post photo and X-ray of the affected area.
Best,
Dr. Maddahi

A picture would be great! Options may include further orthodontics for intrusion, bonding and recontouring or veneers. 

Pictures would be necessary to specifically address your concerns.In general, cosmetic recontouring of the enamel of teeth can give them a new appearance.Orthodontically, it is possible to intrude teeth to give them a shorter appearance.And, a combination of the two techniques works quite well.See an orthodontist that treats adults, as well as a cosmetic dentist for consultations to address your concerns!

Hello
Can you post pictures for us to see.  it is hard to evaluate without pictures.  thank you.  

Without seeing a picture it's tuff to give an accurate answer.  However, the front teeth have a lot of enamel on the edges, sometimes 3-4mm before the underlying dentin is exposed (nerve bearing weaker tooth).  This allows a dentist to reduce and reshape the front teeth with ease while still keeping your teeth healthy and strong.  We call this procedure an Enamoplasty (we drill away tooth) and many dentist do them for a very small fee since it's so easy and takes very little time.